题目内容

He goes shopping so frequently not because he is rich, but because he enjoys ______ politely.

A. speaking
B. being spoken to
C. being spoken
D. speaking to

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To cream a circuit, a conducting wire is attached to an electric cell at one end, and to an electric outlet at the other.

A. battery
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A. 输入、输出、外部实体和加工
B. 变换、加工、数据流和存储
C. 加工、数据流、数据存储和外部实体
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A. 1.44MB，512B
B. 1MB，1024B
C. 2MB，256B
D. 1.44MB，512KB

Complacency towards ecological balance ("It can't happen here!") has resulted in a number of ______.

A. damages
B. wastes
C. catastrophes
D. dangers